21. Martha Manufacturing produces a single product that sells for $80. Variable costs per unit equal $32. The company expects total xed costs to be $72,000 for the next month at the projected sales level of 2,000 units. In an attempt to improve performance, management is considering a number of alternative actions. Suppose management believes that a $16,000 increase in the monthly advertising expense will result in a considerable increase in sales. Sales must increase by how much to justify this additional expenditure? A) 200 units B) 334 units C) 500 units D) None of these answers are correct. Answer: B Explanation: B) $80X - $32X - $16,000 = 0; X = 334 units to cover the expenditures